Can't get the sound back

Identifying the hot keys
A hot key is a combination of the fn key and either the esc key or one of the function keys.
To use a hot key:
Briefly press the fn key, and then briefly press the second key of the hot key combination.
Hot key combination Description
fn+esc Displays information about system hardware components and the system BIOS version number.
fn+f1 Initiates Sleep, which saves your information in system memory. The display and other system
components turn off and power is conserved.
To exit Sleep, briefly press the power button.
CAUTION: To reduce the risk of information loss, save your work before initiating Sleep.
fn+f2 Decreases the screen brightness level.
fn+f3 Increases the screen brightness level.
fn+f4 Switches the screen image among display devices connected to the system. For example, if a
monitor is connected to the computer, fn+f4 alternates the screen image from computer display to
monitor display to simultaneous display on both the computer and the monitor.
Most external monitors receive video information from the computer using the external VGA video
standard. The fn+f4 hot key can also alternate images among other devices that are receiving video
information from the computer.
fn+f5 Initiates the QuickLock security feature. QuickLock protects your information by displaying the
operating system Log On window. While the Log On window is displayed, the computer cannot be
accessed until a Windows user password or a Windows administrator password is entered.
NOTE: Before you can use QuickLock, you must set a Windows user password or a Windows
administrator password. For instructions, see Help and Support. To access Help and support, from
the Start screen, type help, and then select Help and Support.
fn+f6 Displays charge information for all installed batteries. The display indicates which batteries are
charging and reports the amount of charge remaining in each battery.
fn+f7 Mutes or restores speaker sound.
fn+f8 Decreases speaker volume.
fn+f9 Increases speaker volume.
fn+f10 Plays the previous track of an audio CD or the previous section of a DVD or a BD.
32 Chapter 4 Pointing devices and keyboardHot key combination Description
fn+f11 Plays, pauses, or resumes an audio CD, a DVD, or a BD.
fn+f12 Plays the next track of an audio CD or the next section of a DVD or a BD.



http://h20628.www2.hp.com/km-ext/kmcsdirect/emr_na-c03555111-1.pdf

I suspect this is a message you're seeing on a notebook, computer or other device that has a keyboard. The "Fn" key is the "Function" key. When the "Fn" key pressed at the same time another key is pressed - in this case the F4 key, a different result will occur when compared to pressing the F4 alone. This works the same way as when you use the SHIFT key and a letter key - instead of a lower case letter, you get an upper case letter.

Typically, the keys on the keyboard are labeled in a light color. Keys that have a second purpose or function, will have a second label printed in a different color / slight smaller text or both. This label may be text or an icon or graphic. In order to invoke the second function of the F4 key, you will need to inspect the keyboard for the key that has is labeled with "Fn" text on it. Here's what a typical "Fn" key looks like:


The Fn key is in the lower left corner of this keyboard.

I hope this answered your quiestion and good luck!

if your "F" function keys are a second function of the keys they are on there will be a key, usally located in the area of the lower left corner of your keyboard. If the "F" functions are in color, so will the key that activates them. The idea is that you hold down the Fn key while striking the selected "F" key

Below please find key - function overview.

Fn + F7 will turn on/off the webcam

It might help you.

Function Keys Fn+F1 - Places the computer into sleep mode
Fn+F2 - Changes the (I-Powerxross) power settings
Fn+F3 - Switches display modes: LCD only, External monitor only, LCD+External Monitor
Fn+F4 - Turns Wireless LAN on/off
Fn+F5 - Switches OSD (on screen display) on/off
Fn+F6 - Turns the Touchpad on/off
Fn+F7 - Turns the Webcam on/off
Fn+F8 - Mute Sound
Fn+F9 - Reduces speaker volume
Fn+F10 - Increases speaker volume
Fn+F11 - Reduces the screen brightness
Fn+F12 - Increases the screen brightness
Fn+Esc - Toggles Bluetooth & 3G on/off (optional)

Hello,

Try this

Function Keys Fn+F1 - Places the computer into sleep mode
Fn+F2 - Changes the (I-Powerxross) power settings
Fn+F3 - Switches display modes: LCD only, External monitor only, LCD+External Monitor
Fn+F4 - Turns Wireless LAN on/off
Fn+F5 - Switches OSD (on screen display) on/off
Fn+F6 - Turns the Touchpad on/off
Fn+F7 - Turns the Webcam on/off
Fn+F8 - Mute Sound
Fn+F9 - Reduces speaker volume
Fn+F10 - Increases speaker volume
Fn+F11 - Reduces the screen brightness
Fn+F12 - Increases the screen brightness
Fn+Esc - Toggles Bluetooth & 3G on/off (optional)

Thanks

On your computer, that function key combination is probably the one that turns on the external monitor connector. By default, the internal display is on and the external connector is off. The first time you hit the sequence it turns on the external connector and turns off the internal display. Hit that combination again to turn the internal display back on.

Press Fn F4
Some computers think they have a monitor already plugged in. Pressing Fn F4 changes the default monitor to the secondary monitor which you have plugged in.

Hope this helps ^^. Please dont forget to rate, Thanks

hi you should have on your laptop a Fn key and a key that has 2 monitors on it, mine is F4 what you have to do it press the Fn key ( function key ) and then F4 key this should then swap monitors, obviously make sure you have the correct cable plugged in the back of the laptop going to the monitor...hope this helped

You may have turned off the LCD screen. After you turn the computer on, hit Fn+F4 keys and then wait a moment. Then try it again. The F4 key cycles the video output through three settings: from LCD only, to external monitor only, to LCD + external video. You could also try connecting the video output on the back of the computer to a different monitor to see if it's a screen problem on the laptop of a broken video card.

The F4 key has the blue icons for a little TV screens. The Fn key is in the lower left corner.

About two weeks ago I started getting a "Catalyst Control Center" error about the video driver for my MX6453, so I assume there was some sort of update that was pushed through Microsoft or from ATI that changed display settings or drivers. Your computer may have had an extreme reaction to the software update if you accepted it. I did not accept the update and my computer works fine.

You can also try to boot in safe mode which should prevent the advanced drivers from installing. Basically you hit F8 as it's powering up. See here for more info: http://www.pchell.com/support/safemode.shtml

Hi there,
You need to press hold the FN key and press the F4 function key once which toggles the display to the External Display source like the television connected along with the LCD of the Notebook.
If the FN and F4 key combination is pressed again, the display will dissappear from the LCD of the Notebook and remain only on the external source.
If the FN and F4 key combination is pressed third time, the display will be back on the LCD of the Notebook and will not remain on the External display source.
Here are these details in other way :
First time pressing FN + F4    ---> Display on LCD and External display
Second time pressing FN + F4 ---> Display not on LCD but on the External Display
Third time pressing FN + F4 ---> Display back on the LCD and not available on External Display (Normal position).
Below are the details of what the Function keys in your DV1000 Notebook work :
fn + f1 Opens Help and Support Center fn + f2 Opens print options window fn + f3 Opens default Internet browser fn + f4 Switches the image among displays fn + f5 Initiates Standby fn + f6 Initiates QuickLock fn + f7 Decreases screen brightness fn + f8 Increases screen brightness fn + f9 Plays, pauses, or resumes an audio CD or DVD fn + f10 Stops an audio CD or DVD fn + f11 Plays the previous track or chapter on an audio CD or DVD fn + f12 Plays the next track or chapter on an audio CD or DVD fn + esc Displays system information.* (*To clear the system information display, press esc.)
Hope this helps...